Abstract
In this work, a maintenance float system is considered. Equipments in workstation are submitted to overhauls carried out at regular time intervals. A mathematical model has been constructed to find out the best combination of three parameters: the number of standby units, R, the number of maintenance crews in the maintenance centre, L and the time between overhauls, T. The strategy to construct the model involved: the development of differential equations in order to determine system state probabilities; the definition of an operating cycle; the calculation of the cycle duration and respective total maintenance system cost incurred; and the utilization of a search method to find out the combination of parameters that minimizes the total cost of a specific system.

Abstract
The virtual enterprise model is an emerging approach in answer to the new requirements of the business environment, relying on dynamically-reconfigurable partnerships, with extremely high performances, strongly time-oriented while being highly focused on cost and quality, in permanent alignment with the market, and strongly supported by information and communication technology, dictating a paradigm face shift to the traditional organizational models. Networking and reconfiguration dynamics are the main characteristics of this model, requiring enabling and supporting environments, at bearable costs. Some existing technologies and Internet-based environments can partially support this organizational model, but the reconfiguration dynamics can only be assured by environments able to manage, control, and enable networking and dynamics in virtual enterprise creation/reconfiguration. Several environments are introduced in the chapter, and particular focus is given to the market of resources, an environment coping with the requirements of the virtual enterprise model. © 2007, Idea Group Inc.

Abstract
The phenomenon of the enterprise organizational reconfiguration and its dynamics as a business alignment enabler is discussed. Business alignment means the enterprise's actions undertaken to gain synergy between the business; that is, the market opportunity and the provision of the required, or innovative, product, with the required, or designed, specifications at the required, or proper, time, with the lowest cost and best possible return (financial or other). The enterprise's organization "fast reconfiguration," either as a proactive or as a reactive action, or "fast adaptation" or "flexibility" (as a "reactive" action), is seen as the main enabler of business alignment and the main requirement for achieving competitiveness. The need to keep a close alignment with the dynamic market environment in permanent change implies the high dynamics of the organizations' organization, or organizational structure, reconfiguration. The first part of the text presents enterprise's requirements for competitiveness and business alignment, while the second part discusses the phenomenon of the enterprise reconfigurability as the business alignment enabler. In the third part, an analysis of some organizational and management approaches, from the reconfigurability point of view, is presented. The text ends with a conclusion and references. © 2007, Idea Group Inc.

Abstract
The GRMODGRASP, a new algorithm for the container-loading problem (CLP) based on the greedy randomized adaptive search procedure (GRASP) approach, is discussed. Based on a wall-building, constructive heuristic, it can achieve high levels of cargo stability without compromising the container's volume use. The algorithm builds a solution, and then it improves the solution with a local-search algorithm. If it finds a better solution, this new solution replaces the old and a new neighborhood is built around it. The algorithm uses a first better strategy when more than one better solution exists.

Abstract
This paper describes an order planning system for dynamic supply chains, addressing the requirements of a make-to-order business environment. A distributed and decentralized information system based on an architecture of agents and extensively using the internet was designed and implemented, so as to enable new and more powerful decision support. The system aims at responding to the basic requirements of cooperativeness, integration and configurability. It was developed under the scope of the IST European Project Co-OPERATE and implements the functionality defined in the context of the 'request feasibility studies for the network' (ReFS) business solution.

Abstract
In this paper we present a Decision Support System (DSS) to deal with the partner selection problem taking place in the formation or re-organization of a Virtual Enterprise (VE). This DSS is based on a multi-criteria model and handles several types of data (numerical, interval, linguistic and binary). This approach is used to facilitate the expression of the decision maker's preferences and assessments about the potential partners and can be performed individually or by group. The system also allows the assignment of a degree of confidence to each linguistic statement. the operation of the DSS is structured in two phases. In the first phase it determines the set of non-dominated alternatives (potential VEs) through the use of meta-heuristics. The second phase ranks the alternatives for a possible network of enterprises configuring the VE. This is achieved through a procedure based on linguistic analysis and distance measures.